Fuel distributor for stokers



March 35 1936. H. P, ANDERSON n FUEL DISTRIBUTOR FOR STOKERS 2Sheets-Sheet 1 A TTORNE Y.

March 3, 1936. H. P, ANDERSON FUEL DISTRIBUTOR FOR STOKERS Filed' sept.25, 1931 2 Sheets-Sheet 2 N V EN TOR /U/afa/maezfazz ATTORNEY.

Patented Mar. 3, 1936 UNITED STATES PATENT oFFlcE FUEL DISTRIBUTOR FORSTOKERS Application September 23, 1931, Serial No. 564,552

12 Claims.

This invention relates to fuel distributing apparatus for use withstokers of the scatter feed type and is especially adaptable for usewith stokers which are employed to deliver fuel to relatively widefurnaces.

In the use of stokers of the scatter feed type for supplying fuel tosuch wide furnaces, it is preferable to distribute the fuel over thegrates from a point within the furnace so that the fuel may be moreaccurately directed to all parts of the fire. When fuel is sodistributed over the grates, it has been usual to secure the pressureuid head to the stoker discharge conduit, and when adjustments orrepairs to the pressure fluid head were found necessary, the operationof the boiler was suspended in order that the furnace could coolsufficiently to permit the removal of the head for the necessaryadjustments or repairs thereto. This resulted in a loss of fuel, time,and also in a loss of the economical use of the boiler due to itsinterrupted operation.

These disadvantages are obviated by the present invention, the principalobjects of which are the provision of a pressure fluid head arranged toproject fuel from a point within the furnace, being organized to permitits withdrawal from a point exterior to said furnace and also beingarranged so that a variable adjustment exterior to the furnace may bemade of the pressure iiuid head with respect to the fuel stream issuingfrom the stoker discharge conduit.

Other and further objects of this invention reside in the particularconstruction of the parts and in their combination with one another aswill be apparent when the following specification is read in connectionwith the accompanying drawings, in which Figure 1 is a verticallongitudinal section through a portion of a furnace showing theinvention in position;

Figure 2 is a plan view of the structure shown in Figure 1 showing theinvention in position;

Figure 3 is a sectional view taken on the line 3-3 of Figure 1;

Figure 4 is a plan view of the pressure fluid head with portions brokenaway;

Figure 5 is an enlarged fragmentary view of a portion of the structureshown in Figure 4;

Figure 6 is an isometric view of the pressure fluid head; and

Figure 'I is an isometricview of the pressure fluid head support orframe.

On the drawings, the boiler is generally indicated at ID having afurnace Il, provided with agrate I2 and the backwall I3. A stoker I4con- (Cl. 11G- 101) veys fuelfrom a suitable source of supply (notshown) and extends upwardly into the furnace I I through the grate I2for delivering fuel thereto. The stoker I4 includes a horizontaltransfer conduit I5 which passes beneath the backwall I3 and terminatesin an elbow I6 arranged to receive the discharge conduit I1. Thedischarge conduit I'I extends upwardly into the furnace II through anopening I8 bounded by the ring member I9, which serves as a support forthe grate I2 and also supports the protective wall 20 which surroundsthe discharge conduit I1.

Housed within the transfer conduit I5, is a screw conveyor 2| whichcooperates with the e1- bow I6 to elevate the fuel upwardly through saiddischarge conduit I'I, which delivers the fuel into the furnace throughits mouth portion 22. A pressure fluid head 23, disposed immediatelyabove said mouth portion 22, issues blasts of pressure fluid forprojecting the fuel to all parts of the grate.

The pressure fluid head 23 is of novel form and is engageably receivedby a frame member 24 to permit slidable movement thereon. By arrangingthe pressure fluid head 23 to be slidably mounted upon the frame member24, it is possible to move the head forwardly or rearwardly with respectto said discharge conduit mouth portion, thereby permitting more or lessfuel to be projected to the side or rear portion of the furnace.

The frame member 24 is provided with a perforate bottom wall 25,parallel sidewalls 26 and a flange 2'I depending from said perforatebottom 25 whereby said frame member may be secured to the dischargeconduit I'I as by means of the bolts 28. Extending outwardly from eachof said sidewalls 26 is a flange member 29 which receives the dowels 30.The dowels 3l) engage the plate member 3| which partly embraces themouth portion 22 to serve as a flat table from which fuel is projectedover the grate by the pressure fluid head.

At its rearward end, the frame member 24 is provided with a relativelynarrow tail piece 32 which is provided with parallel upstanding walls 33slotted as at 34. This tail piece 32 extends rearwardly through anopening in the furnace backwall, resting freely thereon, and the slottedportions 34 receive suitable means for maintaining the pressure fluidhead in position with said frame member. By securing the frame memberonly to said discharge conduit and at the same time, allowing it `topass freely through the opening in the backwall, the frame member, andconsequently the pressure fluid head, are unaffected by any expansion ofthe boiler which would cause damage to the parts of the stoker. At itsforward portion, each of the parallel walls 26 is provided with aninwardly extending flange 36 which forms with the bottom wall 25, agroove 36a for the purpose as will now appear.

The pressure fluid head 23 comprises a top wall 31, a bottom wall 38, anarcuate front face 39, and the sidewalls 40. The arcuate front face 39of said pressure fluid head is disposed immediately above the stokerdischarge conduit mouth portion 22 and is provided at its bottom with aV-shaped portion 39a which offers the least resistance to the column offuel as it rises through said mouth portion. Included between thepressure fluid head walls are the several chambers such as 4| which areseparated by the partition walls 42 and are provided with jet openings43 in the arcuate front face 39, which issue blasts of pressure fluidfor projecting the fuel. A tongue 44, extending outwardly from each ofthe sidewalls 40, is receivable in the groove 36a of the frame member24, thereby preventing any undue upward movement of the pressure fluidhead 23 which might be caused by the upwardly rising column of fuelissuing from the discharge conduit mouth portion.

At its rearward end, the bottom wall 38 of the pressure fluid head isprovided with a pair of parallel flanges such as 45 which are threadedas at 46, each being arranged to receive a stud such as 41 passingthrough the slotted portions 34 of the frame member 24. This portion ofthe pressure fluid head also extends rearwardly through the opening 35of the backwall I3, thereby permitting the adjustment of the pressurefluid head to be made exterior of the furnace by means of the studs 41cooperating with the slotted portions 34 and the threaded flanges 45 ofthe frame member 24 and the pressure fluid head 23 respectively. It willbe seen that by removing the studs 41 and sliding the pressure fluidhead 23 over the frame member 24 until the tongues 44 are out ofengagement with the grooves 36a, it is possible to tilt the pressurefluid head until the tongues 44 are above the frame member, and thenwithdraw the pressure fluid head through the opening 35 of the backwall.

The rearward portion of the pressure fluid head 23 is also provided witha header 48 which receives pressure fluid from a suitable supply lead49. A transverse wall 5U separates the header 48 from the chambers 4|and is threaded asat 5| to receive Valve seats 52, each of whichcommunicates with its respective chamber 4|. The rearwall 53 of thepressure fluid head is also threaded as at 54 to receive the valvemembers 55 provided with valve stems 56 each of which cooperates withits respective valve seat 52 to control the flow of pressure fluid toeach of said chambers 4|.

While but one embodiment is disclosed, this invention is also adaptablefor use with other elements of a stoker or its distributing member, ascontemplated by the appended'claims.

I claim:

1. In combination with a furnace having a backwall, an opening in saidbackwall and a grate for said furnace, a stoker discharge conduitextending upwardly into said furnace through the grate thereof, saidstoker discharge conduit terminating in a mouth portion arranged for thedelivery of fuel, a pressure fluid head disposed immediately above saidmouth portion and arranged to discharge a blast of pressure fluidthereacross for projecting the fuel over said grate, a frame memberrigidly secured to said discharge conduit forming a support for saidpressure fluid head, said pressure fluid head being slidably adjustableon said frame member longitudinally of the furnace, and means adjacentthe opening in said backwall for securing said pressure fluid head tosaid frame member in any one of a number of positions.

2. In combination with a furnace having a backwall, an opening in saidbackwall and a grate for said furnace, a stoker discharge conduitextending upwardly into said furnace through thegrate thereof, saidstoker discharge conduit terminating in a mouth portion arranged for thedelivery of fuel, a pressure fluid head disposed immediately above saidmouth portion and arranged to discharge a blast of pressure fluidthereacross for projecting the fuel over said grate, and a frame membersecured at its forward end to said discharge conduit and extendingrearwardly through the opening in said backwall, said head beingslidably mounted on said frame member and removable therefrom by slidingsaid head along said member and means without said furnace for securingsaid head in one of a number of positions.

3. In combination with a furnace having a backwall, an opening in saidbackwall and a grate fo-r said furnace, a stoker discharge conduitextending upwardly into said furnace through the grate thereof, saidstoker discharge conduit terminating in a mouth portion arranged toissue a stream of fuel, a pressure fluid head member for projecting thefuel over the grate, said pressure fluid head member extending into saidfurnace through the opening in said backwall and having its forwardportion disposed in the path of the stream of fuel issuing from saiddischarge conduit mouth portion, a frame member rigidly secured to saiddischarge conduit for supporting said pressure fluid head member, saidpressure fluid head member being slidable on said frame member formovement longitudinally of the furnace, one of said members beingprovided with guideways and the other of said members being providedwith tongues arranged to slide in said guideways, and means for securingsaid pressure fluid head member to said frame member in one of a numberof positions.

4. As a new article of manufacture, a pressure fluid head for projectingfuel, said pressure fluid head comprising top and bottom walls, anarcuate front face, a rear wall, and outwardly and rearwardly divergingsidewalls, a flange member extending outwardly from each of saidsidewalls, said member adapted to form one element of a. tongue andgroove connection, and flange members extending downwardly from saidbottom wall. said last named flange members being threaded to receivelocking means.

5. As an article of manufacture, a pressure fluid head for projectingfuel, said pressure fluid head comprising top and bottom walls, anarcuate front face, a rear wall, and outwardly and rearwardly divergingsidewalls, a tongue extending outwardly from each of said sidewalls, andlongitudinally extending flange members depending from said bottom wall,each of said flange membersY being provided with a laterally openingthreaded hole t re,- ceive locking means.

6. As an article of manufacture, a frame member adapted to receive apressure fluid head of a stoker, said frame member comprising aperforate bottom wall, sidewalls extending upwardly from said bottomwall, a laterally extending fiange depending from one end portion ofsaid bottom wall, a flange extending outwardly from each of saidsidewalls adjacent said end portion, each of said sidewalls at its endportion remote from said first named end portion being provided with alongitudinally elongated opening, and a flange member extending inwardlyfrom each of said sidewalls adjacent said rst named end portion, saidlast named flange members adapted to form a guide for the pressure fluidhead.

'7. As an article of manufacture, a frame mem- I ber adapted to receivea pressure iiuid head of a stoker, said frame member comprising aperforate bottom wall, sidewalls extending upwardly from said bottomwall, a flange extending outwardly from each of said sidewalls adjacentone end of said frame member, each of said sidewalls at its end portionremote from said rst named end portion being provided with alongitudinally elongated opening, and a flange member extending inwardlyfrom each of said sidewalls adapted to form a guide with said bottomwall for the pressure fluid head.

8. In a fuel distributing system, la distributing member, a frame memberfor supporting said distributing member, said frame member beingprovided with a slotted ange at one end thereof and a guideway at theopposite end, and means for securing said distributing member to saidframe member through said slotted flange, said distributing memberhaving a tongue engaging said guideway whereby upward movement of saiddistributing member is prevented while said tongue is in engagement withsaid guideway.

9. As an article of manufacture, a frame member adapted to receive apressure fluid head of a Stoker, said frame member comprising aperforate bottom wall, sidewalls extending upwardly from said bottomwall, each of said sidewalls adajcent one end of said frame member beingprovided with a longitudinally elongated opening, and a flange extendinginwardly from each of said sidewalls,

said anges adapted to form a guideway with said bottom wall for thepressure fluid head.

10. As an article of manufacture, a frame member adapted to receive apressure fluid head of a stoker, said frame member comprising aperforate bottom wall, sidewalls extending upwardly from said bottomwall, each of said sidewalls adjacent one end of said frame member beingprovided, with a longitudinally elongated opening, and a flangeextending inwardly from each of said sidewalls remote from saidelongated openings, said flanges adapted to form a guide for thepressure fluid head.

11. In combination with a furnace, a stoker fuel discharge conduitterminating in an open mouth portion arranged for the delivery of fuelto said furnace, a frame member rigidly secured to said conduit adjacentsaid open mouth portion, a pressure uid head member for projecting thefuel supported on said frame member, said pressure uid head member beingmounted slidably adjustable on said frame member longitudinally of thefurnace, means for securing said head member to said frame member in anyone of a number of positions with respect to said discharge conduit andsaid frame member, one of said members being provided with guideways andthe other of said members being provided with tongues arranged to slidein said guideways.

12. In a fuel distributing system, a distributing member, a frame memberfor supporting said distributing member, said frame member beingprovided with slotted fianges at one end thereof and a guideway at theopposite end, and means for securing said distributing member to saidframe member through said slotted flanges, said distributing memberhaving a tongue engaging said guideway whereby upward movement of saiddistributing member is prevented while said tongue is in engagement withsaid guideway, said means for securing said distributing member to saidframe member being adjustable within the slots of the flanges to Varythe longitudinal position of the distributing member.

HOWARD P. ANDERSON.

